StimJim

Reduces Electrical Artifacts During Electrophysiology

Recordings

If you use StimJim in your work, please, cite its corresponding paper in your methods section:

Cermak N,  Wilson MA, Schiller J, Newman JP. (2020). StimJim: Open source hardware for precise electrical stimulation. bioRxiv 

Easy to use, programmable electrical stimulation

The StimJim is a dual-channel electrical stimulator. It allows the generation of arbitrary current or voltage waveforms for extracellular electrical stimulation or electrode activation. Its galvanically isolated outputs greatly reduce electrical stimulation artifacts during concurrent electrophysiological recordings. The device also features an electrode discharge circuit which is automatically activated between pulses to further reduce stimulation artifacts and prevent tissue damage due to charge imbalances. Further, integrated circuitry measures all stimulus currents and voltages so that the user can be sure of correct stimulation delivery during experimentation.

StimJim provides microsecond temporal resolution with microampere or millivolt scale precision on two electrically isolated output channels. Stimjim will enable new kinds of experiments due to its open-source and scalable nature.

• Output range in current mode: -3.33mA to +3.33mA
• Output range in voltage mode: -15V to 15V
• Pulse width down to 0.02 ms
• Compliance voltage is +-13.7V in current mode (+/-3.33uA output possible for resistances up to 4kΩ, +-137uA possible for resistances up to 100kΩ)

• Dual channel stimulator (both with voltage and current mode)
• USB powered
• Isolated channels and power supply
• Onboard ADC to measure actual outputs

• StimJim PCB in anodised aluminium housing
• USB cable

Cermak N,Wilson MA, Schiller J, Newman JP. (2020). Stimjim: Open source hardware for precise electrical stimulation. bioRxiv